Localized plasmon resonances of bimetallic AgAuAg nanorods

Sung Hyun Ahn, Deok Soo Kim, Daeha Seo, Wonjun Choi, Gi Ra Yi, Hyunjoon Song, Q. Han Park, Zee Hwan Kim

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


We investigated the localized surface plasmon resonances of individual AgAuAg nanorods (NRs) using the dark-field spectro-microscopy technique. We find that the scattering spectra of such hetero-NRs show longitudinal resonance wavelengths that are nearly insensitive to the relative composition of Ag and Au. Instead, the resonance is mostly governed by the overall length of the nanorod. This shows that the plasmons oscillate along the entire length of the NR without the significant perturbation at the Ag-Au interfaces. The results demonstrate that the overall geometry as well as the composition determine the tunability of the hetero-metallic nanostructures, and provide an important design rule for the composition-tunable bimetallic plasmon structures.

Original languageEnglish
Pages (from-to)4190-4194
Number of pages5
JournalPhysical Chemistry Chemical Physics
Issue number12
Publication statusPublished - 2013 Mar 28

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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